Trader consensus overwhelmingly favors a high of exactly 30°C in Sao Paulo on March 21, driven by converged forecasts from INMET and international models like ECMWF and GFS, which project daytime peaks around 29-31°C under partly cloudy skies with light winds. Historical March data for the city shows average highs of 28-30°C, aligning with current neutral ENSO conditions and no anomalous heat signals in upper-air analyses. This positioning reflects low model spread, with 95th-percentile ensemble outputs capping at 31°C. Realistic challenges include an unforeseen northerly foehn wind surge or rapid convective clearing, potentially pushing temperatures 2-3°C higher, though such deviations occur in under 10% of similar setups per verification stats.
Resumo experimental gerado por IA com dados do Polymarket · AtualizadoHighest temperature in Sao Paulo on March 21?
Highest temperature in Sao Paulo on March 21?
30°C 100.0%
31°C <1%
32°C <1%
33°C <1%
$69,431 Vol.
$69,431 Vol.
30°C
100%
31°C
<1%
32°C
<1%
33°C
<1%
34°C or higher
<1%
30°C 100.0%
31°C <1%
32°C <1%
33°C <1%
$69,431 Vol.
$69,431 Vol.
30°C
100%
31°C
<1%
32°C
<1%
33°C
<1%
34°C or higher
<1%
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Sao Paulo-Guarulhos International Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/br/guarulhos/SBGR.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Mercado Aberto: Mar 17, 2026, 6:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/br/guarulhos/SBGRResolver
0x69c47De9D...Resolution Source
https://www.wunderground.com/history/daily/br/guarulhos/SBGRResolver
0x69c47De9D...Trader consensus overwhelmingly favors a high of exactly 30°C in Sao Paulo on March 21, driven by converged forecasts from INMET and international models like ECMWF and GFS, which project daytime peaks around 29-31°C under partly cloudy skies with light winds. Historical March data for the city shows average highs of 28-30°C, aligning with current neutral ENSO conditions and no anomalous heat signals in upper-air analyses. This positioning reflects low model spread, with 95th-percentile ensemble outputs capping at 31°C. Realistic challenges include an unforeseen northerly foehn wind surge or rapid convective clearing, potentially pushing temperatures 2-3°C higher, though such deviations occur in under 10% of similar setups per verification stats.
Resumo experimental gerado por IA com dados do Polymarket · Atualizado
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